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Diffraction-limited Visible Light Images of Orion Trapezium Cluster with the Magellan Adaptive Secondary Adaptive Optics System (MagAO)

  • Authors: L. M. Close, J. R. Males, K. Morzinski, D. Kopon, K. Follette, T. J. Rodigas, P. Hinz, Y-L. Wu, A. Puglisi, S. Esposito, A. Riccardi, E. Pinna, M. Xompero, R. Briguglio, A Uomoto, and T. Hare

Close et al. 2013 The Astrophysical Journal 774 94.

  • Provider: AAS Journals

Caption: Figure 5.

PSF fitting photometry of the [O i], r′, and H α images in Figure 3 of θ 1 Ori C 1 C 2 with a 44% Strehl theoretical PSF gave a good fit to both binary components in all cases. For 2012 December 12 UT we find separation is 32.64 ± 0.48 mas and PA is 206 fdg31 ± 0 fdg17. Here we plot this position (in red) against the interferometric orbit of Kraus et al. (2009). The agreement with the predicted position of C 2 w.r.t. C 1 is reasonable given the uncertainty of the orbital solution. However, more VisAO astrometry at this level of accuracy following this poorly sampled side (20° < PA < 210°) of the orbit over the next few years would certainly lead to a better orbital solution than is known today.

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